3129479987 has 8 divisors (see below), whose sum is σ = 3407782800. Its totient is φ = 2862536544.

The previous prime is 3129479971. The next prime is 3129479999. The reversal of 3129479987 is 7899749213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3129479987 - 2⁴ = 3129479971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3129479917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2839268 + ... + 2840369.

It is an arithmetic number, because the mean of its divisors is an integer number (425972850).

Almost surely, 2^3129479987 is an apocalyptic number.

3129479987 is a deficient number, since it is larger than the sum of its proper divisors (278302813).

3129479987 is a wasteful number, since it uses less digits than its factorization.

3129479987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679685.

The product of its digits is 6858432, while the sum is 59.

The square root of 3129479987 is about 55941.7553085350. The cubic root of 3129479987 is about 1462.7071787923.

The spelling of 3129479987 in words is "three billion, one hundred twenty-nine million, four hundred seventy-nine thousand, nine hundred eighty-seven".